Volume-adjustable scroll compressor

Abstract

The invention provides a volume-adjustable scroll compressor, a volume adjusting mechanism is used for the scroll compressor, the volume adjusting mechanism comprises a guide ring, an air cylinder, a piston and a sealing ring, and the guide ring is mounted on a main bearing of the scroll compressor; the air cylinder is installed on the guide ring, and the piston is located above the air cylinder and arranged at the upper end of the static vortex in a sleeving mode. And a sealing ring is embedded between the cylinder and the piston. In the first embodiment, the first pipeline is communicated with the connector and the exhaust port, a first electromagnetic valve is arranged on the first pipeline, and a pressure balance hole is further formed in the air cylinder and communicated with the sealing ring and the low-pressure cavity. In the second embodiment, the first pipeline is communicated with the pipe connector and the exhaust port, and the first pipeline is provided with a first electromagnetic valve, the second pipeline is communicated with the pipe connector and the air suction port. High-pressure gas enters the air cylinder to push the sealing ring, the piston is driven to lift the static vortex, and axial separation is achieved.

Description

Technical Field

[0001] This invention relates to the field of compressors, and more specifically to a scroll compressor with adjustable capacity. Background Technology

[0002] Scroll compressors are commonly used in air conditioning systems, primarily to compress low-pressure, low-temperature refrigerants into high-temperature, high-pressure refrigerants. During operation, the moving scroll rotates relative to the stationary scroll in a circular motion. The moving and stationary scrolls are axially sealed, and the gas is compressed through this circular motion.

[0003] In order to better adapt to the wide load range of air conditioning and refrigeration compressors, scroll compressors need to adjust their output capacity through capacity regulation in practical applications to meet the load requirements. Summary of the Invention

[0004] To achieve the above and other objectives, the present invention is implemented through the following technical solution: a capacity-adjustable scroll compressor, comprising: a scroll mechanism, the scroll mechanism including a stationary scroll and a moving scroll, the stationary scroll and the moving scroll meshing with each other, the stationary scroll and the moving scroll performing relative circular motion; a capacity adjustment mechanism, the capacity adjustment mechanism including a cylinder and a piston, the piston being fitted onto the outer side of the upper end of the stationary scroll; the cylinder having a connecting channel, the cylinder communicating with the pipe interface of the scroll compressor through the connecting channel.

[0005] In one embodiment, the capacity adjustment mechanism further includes a sealing ring, which is embedded between the cylinder and the piston. One end of the connecting channel is connected to the pipe interface, and the other end is connected to the space defined by the sealing ring and the cylinder.

[0006] In one embodiment, the cylinder is further provided with a pressure balance hole, one end of which is connected to the space defined by the sealing ring and the cylinder, and the other end is connected to a low-pressure chamber outside the cylinder.

[0007] In one embodiment, the capacity adjustment mechanism further includes a first pipe and a first solenoid valve, the first pipe being connected to the pipe interface and the exhaust port of the scroll compressor, and the first solenoid valve being provided on the first pipe.

[0008] In one embodiment, the capacity adjustment mechanism includes a first pipe, a first solenoid valve, a second pipe, and a second solenoid valve. The first pipe connects the pipe interface and the exhaust port of the scroll compressor, and the first solenoid valve is provided on the first pipe. The second pipe connects the pipe interface and the intake port of the scroll compressor, and the second solenoid valve is provided on the second pipe.

[0009] In one embodiment, the capacity adjustment mechanism further includes a guide ring mounted on the main bearing of the scroll compressor, and the cylinder mounted on the upper end face of the guide ring.

[0010] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention uses the pressure difference of the pipeline connection to push the sealing ring, thereby driving the static vortex and the dynamic vortex to separate axially to achieve capacity adjustment. The capacity adjustment mechanism occupies little space, has low cost, and can control the solenoid valve to adjust the capacity at any time according to actual needs, which is flexible and convenient. Attached Figure Description

[0011] Figure 1 The diagram shown is a schematic representation of the first embodiment of the present invention.

[0012] Figure 2 Displayed as Figure 1 Cross-sectional view at point A in the middle;

[0013] Figure 3 The diagram shown is a schematic representation of the second embodiment of the present invention.

[0014] 1-Scroll compressor; 11-Top cover; 111-Exhaust port; 12-Housing shell; 121-Pipe interface; 122-Intake port; 13-Exhaust mechanism; 131-Baffle plate; 132-Exhaust hole; 133-Exhaust valve; 14-Sealing mechanism; 141-Sealing disc; 142-Outer sealing ring; 143-Inner sealing ring; 144-Exhaust passage; 15-Compression mechanism; 151-Stationary scroll; 152-Moving scroll; 153-Bearing housing; 154-Intermediate compression chamber; 16-Drive mechanism; 17-Capacity adjustment mechanism; 171-Guide ring; 172-Cylinder; 1721-Connecting passage; 1722-Pressure balance hole; 173-Piston; 174-Sealing ring; 175-First pipe; 176-First solenoid valve; 177-Second pipe; 178-Second solenoid valve. Detailed Implementation

[0015] Please see Figures 1 to 3 The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0016] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "left," "right," "upper," "lower," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0017] Please combine Figure 1 and Figure 2 The original structure of the scroll compressor 1 can be any existing scroll compressor structure. This invention is described using a relatively common scroll compressor. The scroll compressor 1 includes a top cover 11, a housing 12 and a base (not shown in the figure). The upper and lower ends of the housing 12 are fixedly connected to the top cover 11 and the base, respectively. The scroll compressor 1 includes an exhaust mechanism 13, a sealing mechanism 14, a compression mechanism 15, a drive mechanism 16, and a capacity adjustment mechanism 17. The exhaust mechanism 13 is located inside the top cover 11 and is used to exhaust the gas inside the scroll compressor 1. The sealing mechanism 14, the compression mechanism 15, and the drive mechanism 16 are installed from top to bottom inside the housing 12. The sealing mechanism 14 is placed on the compression mechanism 15, with its upper end in close contact with the exhaust mechanism 13. The sealing mechanism 14 is used to isolate the compressed gas inside the compression mechanism 15 from the uncompressed gas. The lower end of the compression mechanism 15 is connected to the drive mechanism 16, and the compression mechanism 15 is used to compress gas. The drive mechanism 16 drives the compression mechanism 15 to perform compression. The capacity adjustment mechanism 17 is used to adjust the output capacity of the compressor to meet the load requirements.

[0018] The top cover 11 has an exhaust port 111. The interior of the top cover 11 is a high-pressure chamber. Compressed high-pressure gas enters the top cover 11 and is discharged from the exhaust port 111.

[0019] The housing 12 is equipped with the pipe interface 121 and the air intake 122. The pipe interface 121 is located above the air intake 122. The pipe interface 121 is embedded in the wall of the housing 12 corresponding to the part where the compression mechanism 14 is located. The air intake 13 is located in the wall of the housing 12 corresponding to the part where the drive mechanism 16 is located.

[0020] The exhaust mechanism 13 includes a partition 131, an exhaust port 132, and an exhaust valve 133. The edge of the partition 131 is embedded in the connection between the top cover 11 and the housing 12. The partition 131 separates the interior of the top cover 11 from the interior of the housing 12. A high-pressure chamber is formed between the partition 131 and the top cover 11, and a low-pressure chamber is formed between the partition 131 and the base. The exhaust port 132 is provided in the middle of the partition 131, and the exhaust valve 133 is installed on the exhaust port 132. The exhaust valve 133 is used to control the gas flow between the top cover 11 and the housing 12.

[0021] The sealing mechanism 14 includes a sealing disc 141, an outer sealing ring 142, an inner sealing ring 143, and an exhaust channel 144. The sealing disc 141 is placed on the compression mechanism 15. The outer sealing ring 142 is embedded between the sealing disc 141 and the compression mechanism 15. The inner sealing ring 143 is embedded on the upper end face of the sealing disc 141 and is always in contact with the lower end face of the partition 131. The exhaust channel 144 is opened in the center of the sealing disc 141. The exhaust channel 144 is aligned with the exhaust hole 132 and communicates with the compression mechanism 15. The gas compressed by the compression mechanism 15 enters the high-pressure chamber through the exhaust channel 144 and the exhaust hole 132.

[0022] The compression mechanism 15 includes a stationary scroll 151, a moving scroll 152, a bearing housing 153, and intermediate compression chambers 154. The stationary scroll 151 is fastened to the moving scroll 152, and the stationary scroll 151 and the moving scroll 152 mesh with each other. The sealing disc 141 is placed on the upper end face of the stationary scroll 151, and the outer sealing ring 142 is embedded between the stationary scroll 151 and the sealing disc 141. The moving scroll 152 is movably mounted on the bearing housing 153, and the bearing housing 153 is connected to the drive mechanism 16. The drive mechanism 16 drives the moving scroll 152 to perform a circular motion relative to the stationary scroll 151. Multiple intermediate compression chambers 154 are formed between the stationary scroll 151 and the moving scroll 152. The stationary scroll 151 and the moving scroll 152 rotate relative to each other, compressing the gas in the intermediate compression chambers 154. The intermediate compression chambers 154 are connected to a low-pressure chamber through a fluid channel.

[0023] When the scroll compressor 1 is working, gas enters the low-pressure chamber inside the housing 12 through the intake port 122, and enters the intermediate compression chamber 154 through the fluid channel. When the moving scroll 152 rotates relative to the stationary scroll 151, it compresses the gas in the intermediate compression chamber 154. The compressed gas is discharged into the high-pressure chamber inside the top cover 11 through the exhaust channel 144 and the exhaust port 132.

[0024] In the first embodiment, the capacity adjustment mechanism 17 includes a guide ring 171, a cylinder 172, a piston 173, a sealing ring 174, a first pipe 175, and a first solenoid valve 176. The guide ring 171 is mounted on the main bearing of the scroll compressor 1, located outside the stationary scroll 151. There is a gap between the lower end face of the guide ring 171 and the stationary scroll 151. The cylinder 172 is mounted on the upper end face of the guide ring 171. The piston 173 is sleeved on the upper end of the stationary scroll 151, located on the upper end face of the cylinder 172. The sealing ring 174 is embedded between the piston 173 and the cylinder 172. The sealing ring 174 is a hollow sealing ring. The pipe interface 121 is connected to the exhaust port 111 through the first pipe 175. The first solenoid valve 176 is provided on the first pipe 175. The first solenoid valve 176 is controlled by a control mechanism (not shown in the figure).

[0025] The cylinder 172 has a connecting channel 1721. One end of the connecting channel 1721 is connected to the pipe interface 121, and the other end is connected to the space defined by the sealing ring 174 and the cylinder 172. High-pressure gas enters the sealing ring 174 from the first pipe 175 through the connecting channel 1721. The high-pressure gas lifts the sealing ring 174 a short distance, and the sealing ring 174 pushes the piston 173 to move. The piston 173 drives the stationary vortex 151 to move. The stationary vortex 151 interacts with the... The moving scroll 152 separates, releasing the axial seal and realizing the capacity adjustment of the scroll compressor 1; the cylinder 172 is also provided with a pressure balance hole 1722, one end of the pressure balance hole 1722 is connected to the sealing ring 174, and the other end is connected to the low-pressure chamber outside the cylinder 172, which facilitates gas discharge. The high-pressure gas in the sealing ring 174 gradually leaks out along the pressure balance hole 1722, the gas pressure is restored, the sealing ring 174 falls down, and the stationary scroll 151 and the moving scroll 152 restore the axial seal.

[0026] The moving scroll 152 performs a circular motion relative to the stationary scroll 151. The moving scroll 152 and the stationary scroll 151 are axially sealed. When the first solenoid valve 176 is opened, the high-pressure gas in the high-pressure chamber enters the cylinder 172 through the first pipe 175 along the connecting channel 1721 and reaches the sealing ring 174. The high-pressure gas pushes the sealing ring 174, and the sealing ring 174 pushes the piston 173. The piston 173 lifts the stationary scroll 151, and a gap is generated between the stationary scroll 151 and the moving scroll 152, resulting in axial separation and control of the compressor capacity. When the first solenoid valve 176 is closed, the high-pressure gas in the sealing ring 174 gradually leaks out along the pressure balance hole 1722, the sealing ring 174 falls down, and the stationary scroll 151 and the moving scroll 152 restore the axial seal.

[0027] Please combine Figure 2 and Figure 3 In the second embodiment, apart from the pressure balance hole 1722 in the first embodiment, the capacity adjustment mechanism 17 further includes a second pipe 177 and a second solenoid valve 178. The second pipe 177 connects the pipe interface 121 and the air intake 122. The second solenoid valve 178 is provided on the second pipe 177. The second solenoid valve 178 is controlled by a control mechanism (not shown in the figure).

[0028] The moving vortex 152 performs circular motion relative to the stationary vortex 151. The moving vortex 152 and the stationary vortex 151 are axially sealed. When the first solenoid valve 176 is open and the second solenoid valve 178 is closed, the high-pressure gas in the high-pressure chamber enters the cylinder 172 through the first pipe 175 along the connecting channel 1721, reaching the sealing ring 174. The high-pressure gas pushes the sealing ring 174, which in turn pushes the piston 173. The piston 173 lifts the stationary vortex 151. A gap is generated between the stationary scroll 151 and the moving scroll 152 to achieve axial separation, thereby controlling the compressor capacity. When the first solenoid valve 176 is closed and the second solenoid valve 178 is open, the high-pressure gas in the sealing ring 174 enters the low-pressure chamber along the connecting channel 1721, the second pipe 177, and the suction port 122. The high-pressure gas in the sealing ring 174 and the cylinder 172 gradually becomes low-pressure gas, the sealing ring 174 falls down, and the stationary scroll 151 and the moving scroll 152 restore axial sealing.

[0029] In summary, this invention uses the pressure difference of the pipeline connection to drive the sealing ring, thereby causing the stationary vortex and the moving vortex to separate axially and achieve capacity adjustment. The capacity adjustment mechanism occupies little space, has low cost, and can control the solenoid valve to adjust the capacity at any time according to actual needs, making it flexible and convenient.

[0030] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial applicability. The above embodiments are merely illustrative of the principles and effects of this invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should still be covered by the claims of this invention.

Claims

1. A scroll compressor with adjustable capacity, characterized in that, include: A vortex mechanism, comprising a stationary vortex and a moving vortex, wherein the stationary vortex and the moving vortex mesh with each other and perform relative circular motion; The capacity adjustment mechanism includes a cylinder and a piston. The piston is fitted onto the upper end of the stationary scroll compressor and is located on the upper end face of the cylinder. A connecting channel is provided on the cylinder, and the cylinder communicates with the pipe interface of the scroll compressor through the connecting channel.

2. The adjustable capacity scroll compressor according to claim 1, characterized in that, The capacity adjustment mechanism also includes a sealing ring, which is embedded between the cylinder and the piston. One end of the connecting channel is connected to the pipe interface, and the other end is connected to the space defined by the sealing ring and the cylinder.

3. A scroll compressor with adjustable capacity according to claim 2, characterized in that, The cylinder is also provided with a pressure balance hole, one end of which is connected to the space defined by the sealing ring and the cylinder, and the other end is connected to the low-pressure chamber outside the cylinder.

4. A scroll compressor with adjustable capacity according to claim 3, characterized in that, The capacity adjustment mechanism further includes a first pipe and a first solenoid valve. The first pipe connects the pipe interface and the exhaust port of the scroll compressor, and the first solenoid valve is provided on the first pipe.

5. The capacity adjustment mechanism according to claim 2, characterized in that, The capacity adjustment mechanism includes a first pipe, a first solenoid valve, a second pipe, and a second solenoid valve. The first pipe connects the pipe interface and the exhaust port of the scroll compressor, and the first solenoid valve is installed on the first pipe. The second pipe connects the pipe interface and the intake port of the scroll compressor, and the second solenoid valve is installed on the second pipe.

6. The capacity adjustment mechanism according to claim 1, characterized in that, The capacity adjustment mechanism also includes a guide ring, which is mounted on the main bearing of the scroll compressor, and the cylinder is mounted on the upper end face of the guide ring.

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